refactor: remove DLD 80m CW award variant

Removed dld-80m-cw.json award definition. Only the main DLD award
remains, which covers all bands and modes.

Co-Authored-By: Claude <noreply@anthropic.com>

award-definitions/dld-80m-cw.json

@@ -1,20 +0,0 @@
-{
-  "id": "dld-80m-cw",
-  "name": "DLD 80m CW",
-  "description": "Confirm 100 unique DOKs on 80m using CW",
-  "caption": "Contact and confirm stations with 100 unique DOKs (DARC Ortsverband Kennung) on the 80m band using CW mode. Only DCL-confirmed QSOs with valid DOK information on 80m CW count toward this award.",
-  "category": "darc",
-  "rules": {
-    "type": "dok",
-    "target": 100,
-    "confirmationType": "dcl",
-    "displayField": "darcDok",
-    "filters": {
-      "operator": "AND",
-      "filters": [
-        { "field": "band", "operator": "eq", "value": "80m" },
-        { "field": "mode", "operator": "eq", "value": "CW" }
-      ]
-    }
-  }
-}